Apparatus for surface oil-pump rods.



N0. 650,734. Patented May 29, I900. R. E. SMITH.

REPAIR APPARATUS FOR SURFACE OIL PUMP RODS.

(Application filed Jan. 8, 1900.)

(No Model.)

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Patented May 29, I900.

R. E. SMITH.

REPAIR APPARATUS FOR SURFACE OIL PUMP RODS.

(Application filed Jan. 8, 1900.)

2 Sheets-Sheet 2.

(No Mbdel.)

'm: NORRIS PETERs co. PHOTO-LITHQ, WASHINGTON, a

NITED STATES 'ATENT Fries.

RICHARD E. SMITH, OF LIMA, OHIO, ASSIGNOR TO THE ST. MARYS DRILLING COMPANY, OF ST. MARYS, OIIIO.

REPAIR APPARATUS roe sum-vies oIL-PUMP noes.

SFEGIFICATION forming part of Letters Patent No. 650,734, dated May 29, 1900. Application filed mu 9,1900. Serial N6. 7.24.. ea mas.)

To (4Z6 whom 7125 may concern:

Be it known that I, RE'jHAP. E SMITH, a citizen of the United States, residing at Lima, in the county of Allen and State of Ohio, have invented new and useful Improvements in Repair Apparatus for Surface Oil-Pump Rods, of which the following is a specification.

This invention relates to repair apparatus for surface oil-pump rods, and is designed for IO use in connection with the surface rods employed for transmitting the power from a central station or engine to the pumping-wells.

My invention has for its object to provide a simple, powerful, and effective device for :5 drawing together the ends of the broken rods and holding them in position while being repaired;- and to this end it consists in the features and in the construction, combination, and arrangement of parts hereinafter described, and particularly pointed out in the claims following the description, reference being had to the accompanying drawings, forming a part of this invention, wherein- Figure 1 is a view in side elevation with one of the side plates r moved. Fig. 2 is a plan view of the (lBVlLe. Fig. 3 is a detail plan View of the sprocket and ratchet wheels. Fig. 4 is a detail view, partially in side elevation and partially in section, of the parts shown in Fig. 3. Fig. 5 is an end elevation of the grip. Fig. 6 is a side elevation of the same. Fig. 7 is a detail view of the bushing employed for gripping metallic pump-rods, and Fig. 8 is a view in elevation of the entire device in operative position.

- Referring to the drawings, the numerals 1 and 2 indicate two parallel side plates, one of which, as 2, is formed with hollow cylindrical bosses 3, which project laterally inward and 0 bear against the inner face of the plate 1. Through said hollow bosses and side plates are passed tie-bolts 4, which operate to firmly fasten the plates together, the bosses operating as spacers to maintain the side plates the proper distance apart. Disposed centrally between the side plates is a sprocket-wheel 5, provided on each side with a ratchet-wheel 6, from which project central y in opposite directionsjournals or trunnions 7, that are jour- 5o naled in the side plates 1 and 2. The sprocketwheel 5 is provided centrally with a circumferential groove 8, and its opposite side flan ges are provided with a plurality of angular or flat faces, the meeting edges of which project radially outward to form sprocket-teeth 9. The sprocket-wheel 5 is designed to be engaged by a chain 10, the alternate links of which are adapted to lie fiat against theflat sides of the sprocket-wheel and between the sprocket-teeth 0, while the intermediate links lie in the circumferential groove at right angles to the axis of the sprocket-wheel, the construction described serving to cause the sprocket-wheel to be firmly gripped by the chain and effectually prevent the latter from slipping. Fixed in the side plates is a bolt 11, on which is journaled a pawll2, arranged to engage the ratchet-wheels 6 to prevent the latter and the sprocket-wheel from rotating backward. This is merely a safety-pawl that is adapted to operate for the purpose described should either of the other pawls hereinafter described fail, from any cause, to operate.

Disposed between the side plates is an angular lever 13, having formed on its opposite sides journals or trunnions 14, that are jour naled in said sides. In the face of the lever next adjacent to the ratchet and sprocket wheels are two sockets or grooves 15, extending transversely across the face of the lever from side to side thereof. The numerals 10 and 17 indicate two pawls, each provided at one end with a cylindrical lug or journal 18, pivoted in the sockets or grooves 15. The said lugs or journals may be readily fitted in place by sliding the same endwise into the grooves or sockets from one side of the lever. Each of the lugs 18 is provided at one side with an angular projection 19 for the purpose presently made apparent. One side of the lever adjacent to the angular projections 19 is recessed or cut away, as at 20, the bottom of said recess being cut away to form a central abutment 21, as shown. Disposed in said recess is a flat spring 22, the ends of which bear against the fiat faces of the angular projections 19, while intermediate its ends it bears against the abutment 21, said spring being thereby constantly under tension and operating to hold the free ends of the pawls l6 and 17 in engagement with the ratchet wheels 6. The lever 13 is provided with an extension or handle 13 of sufficient length to obtain the desired leverage "'21 operating the device. Removably fitted in the ends of the side plates is a bolt 23, on which is loosely 'swiveled a bail or clevis 24, to which a chain may be conveniently attached.

Theoperation of my improved device as above constructed is as follows: When it is desired to repair a broken red, the chain 10 is clamped to one end of said rod and the olevis 24: is in similar manner attached to the other end thereof. 1he operator then oscillates the handle 13 backward and forward, thus giving an oscillating movement to the lcver13. It will be noted that the pivotal points of attachment of the pawls 16 and 17 are 011 opposite sides of a line passing transversely through the fulcrum of the lever at right angles to the latter, and hence as said lever is oscillated about its fulcrum the pawls operate to alternately engage and turn the ratchet and sprocket wheels forward-that is to say, as the pawl 16 is being moved forward to turn the ratchet-wheels the pawl 17 is being retracted to take hold of a frcsh tooth ,and, conversely,as the pawl 17 is being moved forward the pawl 16 is being retracted. A continuous rotary movement is thus comm u nicated to tho sprocket-wheel in the proper directionto draw in the chain 10 and draw the two ends of the broken rod together. \Vhen the two ends of the rod have been drawn completely together in the manner described and the lever 13 has been released, the parts will be held against any backward movement by the pawls 16 and 17, as any backward movement exerted on one of the pawls will communicate a corresponding forward movement to the other, the pawls thus balancing and counteracting one another. As before stated, the pawl 12 is' merely a safety-pawl that acts upon the ratchet-wheels should either of the pawls 16 or 17 be broken-or become inoperative. After the ends of the broken rod have been drawn together they will be securely held in place in the manner set forth while they are being coupled together and repaired. For the purposeof clamping the chains to the broken ends of the red I provide the following means: The numeral 25 indicates a U- shaped yoke, between the sides of which are arranged two clamp plates or heads 26, indieating the upper plate or head and 27 the lower one. The upper clamp plate or head is provided atone end with an upwardly projecting perforated ear'or lug 28, to which the end of the chain or a clevis 29, attached thereto, is connected by a transverse bolt or pin 30, and intermediate its ends said clam p plate or head is provided with a similar ear or lug 31, through which and through corre sponding perforations 32, formed in the upper ends of the yoke, is passed a belt or pin 33, by means of which the upper clamp plate or head is fixed between the upper ends of the yoke. The under side of the lower clamp plate or head is transversely grooved, as at 3st, to straddle the lower portion of the yoke,

and screwed through a threaded aperture in the bottom of the yoke is a hand-screw 35, that bears at its inner end against the under side of the clamp plate or head 27. As above described, the grip is intended for gripping wooden rods, the rod, which is indicated by the numeral 36, passing through the yoke and between the clamp plates or heads, which latter are caused to tightly grip the red by screwing up the hand-screw 35. It will be understood that one such grip will be clamped to each end of the broken rod to be drawn together and .repaired, one of the clamps being attached to the end of the chain 10 and the other clamp to the chain connect-ed to the a semicircular groove 10. In practice to adapt the grip for grasping metallic rods the upper clamp plate or head is lowered until the perforation in its lug ill registers with two perforations 4 1, formed in th sides of the yoke, after which the bolt 01' pin 35} is passed through said perforations, securing the clamp plate or head in its lowered. position. The two sec tions of the split tubular bushing 37 embrace the rod and lie in the V-shaped grooves 39, the end flange 3S resting in the enlarged grooves 40 and preventing endwise movement of the bushing. ly tightening up the hand-screw the two sections of the bushing are caused to grip the rod tightly and securely hold it.

I have shown a spring 12 attached to one side of the casing and bearing upon the pawl 12 to hold the latter in positiveengagement with the ratchet-wheels 6. It will be obvious that this spring may be constructed or arranged in any suitable or preferred mauner'.

lzlaving described my invention, what I claim is- 1. In a pump-rod repair device of the character described, the combination with a frame or casing, of a sprocket and ratchet wheel journaled therein to rotate together, means for attaching a chain to said casing, a lever journaled in the casing, two pawls pivotally attached to the lever on opposite sides of the fulcrum of the latter, and means for positively holding the pawls in engagement with the ratchet-wheel, said pawls operating to alternately engage the ratchet-wheel as the lever is oscillated back and forth and communicate a continuous rotary movement to the ratchet and sprocket wheel, substantially as described.

2. In a pn 1np-rod repair device of the char acter deseribed,the combination with a frame 650,734 p y g or casing, of a sprocket and ratchet wheel journaled therein to rotate together, a lever journaled in the casing, two .pawls pivotally attached to the lever on opposite sides of the fulcrum of the latter, means for positively holding the pawls in engagement with the ratchet-wheel, a chain attached to said casin g, a chain passing about the sprocket-Wheel, and grips attached to the ends of the said chains for grasping the ends of the broken rod to be drawn together, substantially as described and for the purpose specified.

3. In a pump-rod repair device of the character described, the combination with a frame or casing, of a sprocketwheel journaled therein, ratchet-wheels arranged on the opposite sides of the sprocket-wheel and rotating therewith, a lever journaled in the casing, two pawls pivotally attached to the lever on opposite sides of the fulcrum of the latter and straddling the sprocket-wheel to engage said ratchet-wheels, and means for positively holding said pawls in engagement with the ratchetwheels, said pawls operating to alternately engage said ratchet-wheels as the lever is 0scillated back and forth and communicate a continuous rotary movement to the ratchet and sprocket wheels, substantially as described.

41. In a pump-rod repair device of the character described, the combination with a frame or casing, of a sprocket and ratchet wheel joninaled therein to rotate together, a lever jo'urnaled in the casing, two pawls pivotally attached to the lever on opposite sides of the fulcrum of the latter, angular projections on the fulcru ms of the pawls, and a fiat spring bearing at its ends against said angular projections and intermediate its ends against a fixed abutment on the lever, said spring operatingto hold the free ends of the pawls in engagement with the ratchet-wheel, substantially as described.

5. In a pump-rod repair device of the character described, the combination witha frame or casing, of a sprocket and ratchet wheel journaled therein to rotate together, a lever journaled in the casing, two pawls pivotally attached to the lever on opposite side". of the fulcrum of the latter, angular projections on the fulcrums of the pawls, a flat spring disposed in a recess formed in the face of the lever, the bottom of said recess being formed with a central abutment, and a fiat spring arranged to bear intermediate its ends against said abutment and at its ends against said angularprojections, whereby. the said pawlsare held in engagement with the ratchet-wheel, substantially as described.

6. In a pump-rod repair device of the character described, the combination with a frame or casing, of asprocket and ratchet wheel journaled therein to rotate together, a lever j ournaled in the casing and having formed in its face on opposite sides of its fulcrum grooves or sockets, and pawls provided with cylindrical lugs journaled in said grooves or sockets and at their free ends engaging said ratchet-wheel, substantially as described.

7. A grip for oil-pump rods comprising a U shaped yoke, a clamp-plate movably arranged between the sides of the yoke, a corresponding clam p-plate fixed between the ends of the yoke and provided with a perforated lug and pin for the attachment of a chain, and a hand-screw arranged in the closed end of the yoke and engaging the movab e clamp-plate to clamp the latter to the pump-rod, substan tially as described.

8. A grip for oil-pu mp rods,eomprising a U shaped yoke, a clamp-plate movably arranged between the sides of the yoke, a corresponding clamp-plate fixed between the sides of the yoke opposite the movable clamp-plate, said clamp-plates being grooved longitudinally on their adjacent faces, a split bushing disposed in said grooves, and a hand-screw for forcing the movable clamp-plate toward the fixed clamp-plate, substantially as described and for the purpose specified.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

RICHARD E. SMI'III.

\Vitnesses:

O. E. LYNCH, D. V. :HUNNESON. 

